Isaiah l



UNITED STATES PATENT OFFICE.

ISAIAH I.. ROBERTS, OF BROOKLYN, ASSIGNOR TO THE ROBERTS-BREVOORT ELECTRIC COMPANY, (LIllIITED,) OF NEN YORK, N. Y.

SECON DARY BATTERY.

SPECIFICATION forming part of Letters Patent No. 396,367, dated January 15, 1889.

Application filed May 1, 1888.

resident of the city of Brooklyn, county of Kings, and State of New York, and a citizen 5 of the United States, have made a new and i useful invention in Electric Batteries, of which the following is a specification.

IO able conductingsnpports.

trouble has been experienced in keeping the oxides in position, and sheets of felt have I Serial No. 272,519. (No model.)

activity takes place through the paste with almost the same freedom as through the liquid generally employed, the paste, in fact, acting like solid water or as a permanent or fixed electrolyte. I

In making the paste which is to surround l the elements I may make it as follows: I take My invention relates to storage-batteries in which the oxides of metals are carried by suit- 1 In such batteries i preferably ordinary starch and heat it preferably to about 212 Fahrenheit when mixed' with water, using about two ounces of starch to a quart of water and thus form the paste. It acids are to be used, they must be added when the paste is cold and must be worked 4;

My invention consists in surrou'mling the plate or plates with a paste made from animal L gelatinous or Vegetable glutinous material, such as flour, starch, or gelatine. I take an ordinary storagebattery, and I take preferawith water, and I add after it is cold by mix} ing in it sulphuric or other suitable acid, one

bly starch and I mix the. same into a paste The, T

paste fills the cell in which the elements are placed. I have discovered that chemical into it. If chloride of sodium, caustic soda, v and the like are used, they may be added to the water before the cooking of the starch. The addition of sulphuric or other acids to-- the starch must be made when the starch 5o paste is cold.

\Vhat I claim, and desire to secure by Letters Patent, is

The coml'rination, in an electric battery, of a suitable conductor carrying upon it the oxide of a metal with its coated side or sides in contact with a mass of paste, substantially as described, which holds the oxide in place upon the conductor and permits electrolysis.

ISAIAH L. ROBERTS.

\Vitnesses:

BERN. 'l. VETTERLEIN, M. E. STODDARD. 

